Bests & Worsts Reviews from Amazon

Best thing ever. I just bought a 2012 BMW X5 - diesel. After 50 miles my check engine light came on and I took it back to the dealer. The dealer cleared the fault code telling me it was a tail light error. After 50 miles the light came on again ... took the car back ... the dealer said it was an AC error and it's fixed. Of course after another 50 miles the light came on again so I ordered this little thing that showed me the fault code was coming from the NOX sensor. I cleared the fault code and drove another 50 miles and the light came on again. I took the car to the dealer with the light on and told him it's the NoX sensor. The dealer said it's not true because his computer shows him a fault code from a light inside the car and that I should expect check engin light on all the time on BMW cars. I took out the kobra and showed him that my 20$ computer is better than his 5000$ computer and I said that I will go to another BMW expert and get an official diagnose and I will sue him. He said that he can't change it in his shop so I have to go to another shop and he will pay the bill - 2700$ After the sensor was changed my BMW works great and no mor check engine lights on. I used the free OBD doctor app from the app store. Here is a printscreen from my phone.